<template>
  <div>
    <div class="user-info-head"
         @click="editCropper()"><img v-bind:src="options.img"
           title="点击上传头像"
           class="img-circle img-lg" /></div>
    <el-dialog :title="title"
               :visible.sync="open"
               width="800px"
               append-to-body
               @opened="modalOpened"
               @close="closeDialog">
      <el-row>
        <el-col :xs="24"
                :md="12"
                :style="{height: '350px'}">
          <vue-cropper ref="cropper"
                       :img="options.img"
                       :info="true"
                       :autoCrop="options.autoCrop"
                       :autoCropWidth="options.autoCropWidth"
                       :autoCropHeight="options.autoCropHeight"
                       :fixedBox="options.fixedBox"
                       editCropper
                       :outputType="options.outputType"
                       @realTime="realTime"
                       v-if="visible" />
        </el-col>
        <el-col :xs="24"
                :md="12"
                :style="{height: '350px'}">
          <div class="avatar-upload-preview">
            <img :src="previews.url"
                 :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2"
                :sm="3"
                :xs="3">
          <el-upload action="#"
                     :http-request="requestUpload"
                     :show-file-list="false"
                     :before-upload="beforeUpload">
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}"
                :sm="2"
                :xs="2">
          <el-button icon="el-icon-plus"
                     size="small"
                     @click="changeScale(1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}"
                :sm="2"
                :xs="2">
          <el-button icon="el-icon-minus"
                     size="small"
                     @click="changeScale(-1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}"
                :sm="2"
                :xs="2">
          <el-button icon="el-icon-refresh-left"
                     size="small"
                     @click="rotateLeft()"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}"
                :sm="2"
                :xs="2">
          <el-button icon="el-icon-refresh-right"
                     size="small"
                     @click="rotateRight()"></el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}"
                :sm="2"
                :xs="2">
          <el-button type="primary"
                     size="small"
                     @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import store from "@/store";
import { VueCropper } from "vue-cropper";
import { uploadAvatar } from "@/api/system/user";
import { debounce } from '@/utils'

export default {
  components: { VueCropper },
  props: {
    user: {
      type: Object
    }
  },
  data () {
    return {
      // 是否显示弹出层
      open: false,
      // 是否显示cropper
      visible: false,
      // 弹出层标题
      title: "修改头像",
      options: {
        img: store.getters.avatar, //裁剪图片的地址
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 200, // 默认生成截图框宽度
        autoCropHeight: 200, // 默认生成截图框高度
        fixedBox: true, // 固定截图框大小 不允许改变
        outputType: "png" // 默认生成截图为PNG格式
      },
      previews: {},
      resizeHandler: null
    };
  },
  methods: {
    // 编辑头像
    editCropper () {
      this.open = true;
    },
    // 打开弹出层结束时的回调
    modalOpened () {
      this.visible = true;
      if (!this.resizeHandler) {
        this.resizeHandler = debounce(() => {
          this.refresh()
        }, 100)
      }
      window.addEventListener("resize", this.resizeHandler)
    },
    // 刷新组件
    refresh () {
      this.$refs.cropper.refresh();
    },
    // 覆盖默认的上传行为
    requestUpload () {
    },
    // 向左旋转
    rotateLeft () {
      this.$refs.cropper.rotateLeft();
    },
    // 向右旋转
    rotateRight () {
      this.$refs.cropper.rotateRight();
    },
    // 图片缩放
    changeScale (num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    // 上传预处理
    beforeUpload (file) {
      if (file.type.indexOf("image/") == -1) {
        this.$modal.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
      } else {
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => {
          this.options.img = reader.result;
        };
      }
    },
    // 上传图片
    uploadImg () {
      this.$refs.cropper.getCropBlob(data => {
        let formData = new FormData();
        formData.append("avatarfile", data);
        uploadAvatar(formData).then(response => {
          this.open = false;
          this.options.img = response.imgUrl;
          store.commit('SET_AVATAR', this.options.img);
          this.$modal.msgSuccess("修改成功");
          this.visible = false;
        });
      });
    },
    // 实时预览
    realTime (data) {
      this.previews = data;
    },
    // 关闭窗口
    closeDialog () {
      this.options.img = store.getters.avatar
      this.visible = false;
      window.removeEventListener("resize", this.resizeHandler)
    }
  }
};
</script>
<style scoped lang="scss">
.user-info-head {
  position: relative;
  display: inline-block;
  height: 120px;
}

.user-info-head:hover:after {
  content: "+";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  color: #eee;
  background: rgba(0, 0, 0, 0.5);
  font-size: 24px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: pointer;
  line-height: 110px;
  border-radius: 50%;
}
</style>
